Results are given on a search for the decay W+/- --> pi+/--gamma with the UA2 detector in ppBAR collisions at square-root s = 630 GeV. No signal for such a process is observed and upper limits on the ratio R = GAMMA(W+/- --> pi+/--gamma)/GAMMA(W+/- --> e+/--nu) < 4.9 x 10(-3) and on the branching ratio BR(W+/- --> pi+/--gamma) < 5.4 x 10(-4) are derived at 95% confidence level.
EXPERIMENTAL LIMIT ON THE DECAY W+--]PI+-GAMMA AT THE CERN PBARP COLLIDER / J. ALITTI, G. AMBROSINI, R. ANSARI, D. AUTIERO, P. BAREYRE, I. BERTRAM, G. BLAYLOCK, P. BONAMY, K. BORER, M. BOURLIAUD, D. BUSKULIC, G. CARBONI, D. CAVALLI, V. CAVASINNI, P. CENCI, J. CHOLLET, C. CONTA, G. COSTA, F. COSTANTINI, L. COZZI, A. CRAVERO, M. CURATOLO, A. DELLACQUA, T. DELPRETE, R. DEWOLF, L. DILELLA, Y. DUCROS, G. EGAN, K. EINSWEILER, B. ESPOSITO, L. FAYARD, A. FEDERSPIEL, R. FERRARI, M. FRATERNALI, D. FROIDEVAUX, G. FUMAGALLI, J. GAILLARD, F. GIANOTTI, O. GILDEMEISTER, C. GOSSLING, V. GOGGI, S. GRUNENDAHL, K. HARA, S. HELLMAN, J. HRIVNAC, H. HUFNAGEL, E. HUGENTOBLER, K. HULTQVIST, E. IACOPINI, J. INCANDELA, K. JAKOBS, P. JENNI, E. KLUGE, N. KURZ, S. LAMI, P. LARICCIA, M. LEFEBVRE, L. LINSSEN, M. LIVAN, P. LUBRANO, C. MAGNEVILLE, L. MANDELLI, L. MAPELLI, M. MAZZANTI, K. MEIER, B. MERKEL, J. MEYER, M. MONIEZ, R. MONING, M. MORGANTI, L. MULLER, D. MUNDAY, M. NESSI, F. NESSITEDALDI, C. ONIONS, T. PAL, M. PARKER, G. PARROUR, F. PASTORE, E. PENNACCHIO, J. PENTNEY, M. PEPE, L. PERINI, C. PETRIDOU, P. PETROFF, H. PLOTHOWBESCH, G. POLESELLO, A. POPPLETON, K. PRETZL, M. PRIMAVERA, M. PUNTURO, J. REPELLIN, A. RIMOLDI, M. SACCHI, P. SCAMPOLI, J. SCHACHER, B. SCHMIDT, V. SIMAK, S. SINGH, V. SONDERMANN, R. SPIWOKS, S. STAPNES, C. TALAMONTI, F. TONDINI, S. TOVEY, E. TSESMELIS, G. UNAL, M. VALDATANAPPI, V. VERCESI, A. WEIDBERG, P. WELLS, T. WHITE, D. WOOD, S. WOTTON, H. ZACCONE, A. ZYLBERSTEJN. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 277:1-2(1992), pp. 203-208. [10.1016/0370-2693(92)90980-I]
EXPERIMENTAL LIMIT ON THE DECAY W+--]PI+-GAMMA AT THE CERN PBARP COLLIDER
L. Perini;
1992
Abstract
Results are given on a search for the decay W+/- --> pi+/--gamma with the UA2 detector in ppBAR collisions at square-root s = 630 GeV. No signal for such a process is observed and upper limits on the ratio R = GAMMA(W+/- --> pi+/--gamma)/GAMMA(W+/- --> e+/--nu) < 4.9 x 10(-3) and on the branching ratio BR(W+/- --> pi+/--gamma) < 5.4 x 10(-4) are derived at 95% confidence level.
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